iPhone:

You're able to snap a new photo from within the app or import one from your library. You can then work with a wide variety of solid colors to enhance tones or apply gradients. Three different shape tools are also available, allowing you to apply color to specific areas. The app also includes the ability to adjust the size and angle of shapes, create custom colors, and share your creations via Facebook, Twitter, or email.
Geló is available for free for a limited time. It has a 4-star rating with a total of 19 ratings.

When measuring your heart rate, just place your index finger over your iDevice's LED flash and camera. The app will display your current BPM in real-time during the test. When the test is complete, you'll have the chance to record when you measured your heart rate, how you felt, and attach any other details. Results can be shared via Facebook, Twitter, or email. The app also includes a daily reminder option, and history that can be filtered.
Runtastic Heart Rate Monitor & Pulse Tracker PRO is available for free for a limited time. It has a 4.5-star rating with a total of 986 ratings.

Its unique quadruple-scroller interface allows you to capture and combine different tops, bottoms, shoes, and outerwear with ease. Once you get the hang of it, that is, which isn't too difficult since the app includes an in-depth tutorial. It also includes the ability to schedule outfits on a calendar, share your favorite combinations via Facebook, and backup and restore your data.
ClosetFashions Wardrobe Manager is available for free today only (12/01). It has a 4-star rating with a total of 37 ratings.

Universal:

Grilly The Cheese ($0.99 → Free, 25.0 MB): Take control of the happiest grilled cheese sandwich you’ll ever see and help him find his way through an obstacle filled world in this distance game.

Grilly has escaped through an open window and is now free to enjoy the outdoors. The only problem is, the outdoors is littered with dangerous obstacles and creatures. Just tap on the screen to cause Grilly to leap over turtles, park benches, and giant pits. Try to collect all of the coins in view while staying on the hunt for delicious fortune cookies. You’re able to use the coins to buy accessories and power-ups for Grilly. The game includes randomly generated obstacles, 40 missions to complete, and achievements and leaderboards via Game Center.
Grilly The Cheese is available for free for a limited time. It has a 4.5-star rating with a total of 133 ratings.

The Walking Dead: Assault ($2.99 → Free, 226.3 MB): Play as you’re favorite characters from The Walking Dead and try to survive the zombie apocalypse in this squad-based tactical game.

You’re able to assemble your team of four by selecting popular characters from the series like Rick, Glenn, Shane, Carl, Andrea, and Lori. Then go on the hunt for supplies by double-tapping to command your team. You’re able to create distractions as well to divert attention away from your party and wipe out the zombie infestation. Unlock and upgrade your characters’ attributes using the supplies you’ve recovered to turn the odds in your favor. The game includes a fantastic comic book art style, all kinds of The Walking Dead bonus content, and achievements and leaderboards via Game Center.
The Walking Dead: Assault is available for free for a limited time. It has a 4.5-star rating with a total of 8731 ratings.

PDF Pro – Advanced PDF Reader ($2.99 → Free, 8.5 MB): If you have a large collection of PDF documents, this is the perfect app to help you get a handle on them.

You’re able to import PDFs via Dropbox, from your computer via iTunes File Sharing or Wi-Fi, or download them directly from the web. You can then sort and arrange them within folders, and add your own tags and colored labels. When viewing PDFs you’re able to jump to specific pages, add notes, add bookmarks, and search. PDFs can also be protected with passwords, printed via AirPrint, or shared via email.
PDF Pro – Advanced PDF Reader is available for free for a limited time. It has a 3.5-star rating with a total of 56 ratings.

Tiny Defense ($2.99 → Free, 136.5 MB): It's up to you to save the Minirobots' beautiful planet by strategically setting up your defenses in this 2-D tower defense game.

You can place units almost anywhere in the side-view grid, just as long as you place ground units on the ground and air units in the air. The game includes 40 robot types, five environments, 150 levels, 30 mini-games, and achievements via Game Center.
Tiny Defense is available for free for a limited time. It has a 5-star rating with a total of 12225 ratings.

iPad:

tipSkip HD ($0.99 → Free, 1.5 MB): Forget fumbling around with your iPad to control your music. All you have to do is knock with tipSkip.

The app allows you to control your music playback by physically knocking on your iPad or the table it's on two, three, or four times. You can customize each knock action and change the sensitivity within the settings menu. Just make sure to show a little restraint when knocking on your expensive iPad or the table.
tipSkip HD is available for free for a limited time. It has a 4-star rating with a total of 26 ratings.

That concludes today's issue of Apps Gone Free. If you like staying on top of these daily deals, don't forget to check out our free AppsGoneFree app. It provides all the deals each day, and even an archive of past deals that are still active.

Developers:

If you are a developer who would like to get your app included in our “Apps Gone Free” daily lists, here’s our basic set of rules:

It must have at least a three-star average rating at the time it goes free.

The app must not have been free numerous times (3+) over the last six months.

The free version of your app must not include ads.

To submit an app, simply send a request to [email protected] with the subject “Apps Gone Free.” Please include the name of the app, a link to it in the App Store,